128 Bulletin 313 



Cercospora acalyph^ Peck. — On the leaves of acalypha virgin- 

 ica. Causes small, very thin, circular, white spots with narrow pur- 

 plish-brown borders. Conidiophores fasciculate, septate, brown, 

 54-75 X 5 /a; conidia cylindrical, attenuated at distal end, 5-8 septate, 

 hyaline, 50-100 x 3 /*. 



771. Infected leaf of Acalypha virginica. 772. Conidiophore and conidium, 

 1/12. 



Cercospora ageratoides E. & E.^ — On Eupatoriiim album, E. 

 ageratoides, etc. Causes brown, subangular spots bounded by vein- 

 lets, becoming- confluent, 1-3 mm. ; conidiophores in tufts, brown, un- 

 branched, septate, 50-90 x 4 /x; conidia cylindrical or lanceolate, 1-6 

 septate, 40-75 x 3.5-5 fx. 



773. Conidia, 1/12. 



Cercospora alth^ina Sacc. — On leaves and stem of hollyhock 

 and some other Mahacece, causing brown spots. Conidiophores, 

 olive brown, fasciculate, slender, few-septate, 40 x 5 /^ ; conidia api- 

 cal, hyaline, cylindric to obclavate or broadly fusoid, straight, api- 

 cally obtuse, 2-9 septate, 40-60 x 5 /*. 



774. Infected leaf of Maha sp. 775. Conidiophores, 1/12. 776. Conidia, 1/12. 



Cercospora anthelmintica Atk. — On the leaves of Chenopo- 

 dium ambrosioides var. anthelminticum. Causes small, light brown, 

 circular spots with broad reddish border, 1-3 mm. in diameter. Coni- 

 diophores fasciculate, dentate, septate, almost hyaline, 30-100 x 4-4.5 

 fi] conidia cylindrical, septate, hyaline, 25-100 x 4-4.5 p.. 



777. Infected leaf of Chenopodium amhrosiodes var. anthelminticum. 77Z. 

 Conidiophores, 1/12. 779. Conidium, 1/12. 



